Just some advice for people. Trading isn't as profitable as capturing prisoners. Manhunters are pretty easy to get. If you give practice lances and blunts to your companions they will level fast and get you a lot of prisoners. With 5 prisoner management I can capture 25 enemies in 1-2 fights with a few manhunter type troops and my companions. The problem with trading is that is boring, does not level you and if you buy too much, it is hard to sell. 25 sea raiders nets you more than 2500 denars plus the goods you keep or sell. The only downside is searching for ransom brokers.
Trading also passes in game time, if it is faster in real world time to get money, lords and kings are still leveling while you are not. While manhhunting makes you much richer and higher level in a much shorter in-game time.
Immediately start building businesses. High end armor can wait, just get a good weapon and scavenge what you can for your party. Getting a business in every city within 100 days makes you very rich down the road. Some lords will hate you right away, no helping that. It is worth it to do some quests for him before you join a faction and get him to like you. For me it is always tax collecting on the city you want to build in. That drops your rep with the city but nets you a nice profit. The city almost always made me deliver cattle across the map, which just sucks but is worth it to get that income.
When there is no one to hunt, do quests for towns you want to recruit in. Spread it out a bit, ether among your chosen faction or multi-faction if you want have diverse troops. Having 20+ reputation with a town defiantly helps make recruiting easy.
Find a few low-honor lords that will hate you if you let them go in battle. Remember who they are and always capture them for money. Raid their towns as well. You don't care what they think and it raises your right to rule. Don't take companions that protest too much, you can get 5k plus food off of raiding a town.
Ibdeles castle is probably the easiest to defend. If you fill it with archers, the 5 minutes that it takes for the siege tower to get to the wall should be enough to decimate the enemy. Also, Rhodoks sergeants carry blunts, so if you use them, you can use the blunts command and dominate even an enemy army. Top tier troops go for over 200 denars each.